linux-kernel - Re: [kbuild-all] Re: [ardb:for-kernelci 25/25] arch/arm/kernel/traps.c:865:17: warning: no previous prototype for function 'handle_bad

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Date:   Thu, 2 Dec 2021 08:53:13 +0100
From:   Ard Biesheuvel <ardb@...nel.org>
To:     Rong Chen <rong.a.chen@...el.com>
Cc:     kernel test robot <lkp@...el.com>, llvm@...ts.linux.dev,
        kbuild-all@...ts.01.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [kbuild-all] Re: [ardb:for-kernelci 25/25] arch/arm/kernel/traps.c:865:17:
 warning: no previous prototype for function 'handle_bad_stack'

On Thu, 2 Dec 2021 at 08:34, Rong Chen <rong.a.chen@...el.com> wrote:
>
>
>
> On 11/30/21 21:12, Ard Biesheuvel wrote:
> > On Thu, 25 Nov 2021 at 02:35, kernel test robot <lkp@...el.com> wrote:
> >> tree:   git://git.kernel.org/pub/scm/linux/kernel/git/ardb/linux.git for-kernelci
> >> head:   5da04a8b7050432b72f6551b6c95e4b5b5fd68d1
> >> commit: 5da04a8b7050432b72f6551b6c95e4b5b5fd68d1 [25/25] ARM: implement THREAD_INFO_IN_TASK for uniprocessor systems
> >> config: arm-randconfig-r024-20211124 (https://download.01.org/0day-ci/archive/20211125/202111250918.ErFZktQF-lkp@intel.com/config)
> >> compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 67a1c45def8a75061203461ab0060c75c864df1c)
> >> reproduce (this is a W=1 build):
> >>          wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
> >>          chmod +x ~/bin/make.cross
> >>          # install arm cross compiling tool for clang build
> >>          # apt-get install binutils-arm-linux-gnueabi
> >>          # https://git.kernel.org/pub/scm/linux/kernel/git/ardb/linux.git/commit/?id=5da04a8b7050432b72f6551b6c95e4b5b5fd68d1
> >>          git remote add ardb git://git.kernel.org/pub/scm/linux/kernel/git/ardb/linux.git
> >>          git fetch --no-tags ardb for-kernelci
> >>          git checkout 5da04a8b7050432b72f6551b6c95e4b5b5fd68d1
> >>          # save the config file to linux build tree
> >>          COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=arm
> >>
> >> If you fix the issue, kindly add following tag as appropriate
> >> Reported-by: kernel test robot <lkp@...el.com>
> >>
> >> All warnings (new ones prefixed by >>):
> >>
> > This is yet another false positive. asmlinkage routines don't need a
> > prototype because they are called from assembler. This is not going to
> > get fixed, so please don't report this error anymore.
>
> Hi Ard,
>
> Sorry for the noise, we'll ignore the warnings in the future.
>

Thanks! And if at all possible, please extend this to all routines
marked as asmlinkage?

-- 
Ard.